1 . AGRICULTURE - COMMON ORGANIZATION OF THE MARKETS - DISCRIMINATION BETWEEN PRODUCERS OR CONSUMERS WITHIN THE COMMUNITY - PROHIBITION - SCOPE ( EEC TREATY , ART . 40 ( 3 ), SECOND SUBPARAGRAPH ) 2 . EEC- EXTERNAL RELATIONS - PRINCIPLE OF NON-DISCRIMINATION - NO SUCH PRINCIPLE 3 . COMMON COMMERCIAL POLICY - TRADE WITH NON-MEMBER COUNTRIES - PROTECTIVE MEASURES ADOPTED BY THE COMMUNITY - PERMISSIBILITY - CONDITIONS ( EEC TREATY , ART . 110 ) 4 . COMMON COMMERCIAL POLICY - REGULATION THEREOF BY THE COMMUNITY INSTITUTIONS - DISCRETIONARY POWER - LEGITIMATE EXPECTATION OF TRADERS IN THE MAINTENANCE OF AN EXISTING SITUATION - NONE